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Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
Untreated Gemstones Size
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3.66ct Pink Morganite, Pear Shape, Transparent

3.66ct Pink Morganite, Pear Shape, Transparent

14.1 x 8.1 mm

$ 40.10

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24.03ctw Multicolor Jasper, Oval, Opaque

24.03ctw Multicolor Jasper, Oval, Opaque

22.7 x 14.3 mm

$ 14.13

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28.57ct Yellow Obsidian, Oval, Opaque

28.57ct Yellow Obsidian, Oval, Opaque

32 x 23.6 mm

$ 31.31

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7.33ct Green Prehnite, Pear Shape, Transparent
Prehnite Product Video (714885)

7.33ct Green Prehnite, Pear Shape, Transparent

18.1 x 9.5 mm

$ 182.52

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2.76ct Pink Strawberry Quartz, Oval, Transparent

2.76ct Pink Strawberry Quartz, Oval, Transparent

10 x 8 mm (calibrated)

$ 20.51

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7.50ct Multicolor Rainbow Pyrite, Fancy, Opaque

7.50ct Multicolor Rainbow Pyrite, Fancy, Opaque

20 x 15 mm (calibrated)

$ 19.42

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2.90ctw Yellow Citrine, Emerald Cut, VVS-VS

2.90ctw Yellow Citrine, Emerald Cut, VVS-VS

8 x 6 mm (calibrated)

$ 20.15

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18.89ct Turquoise Grandidierite, Oval, Translucent
Grandidierite Product Video (548258)

18.89ct Turquoise Grandidierite, Oval, Translucent

18 x 14 mm

$ 620.87

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0.45ct Yellow Citrine, Heart, VVS

0.45ct Yellow Citrine, Heart, VVS

5 x 5 mm (calibrated)

$ 3.59

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11.80ctw Green Prehnite, Fancy, Translucent

11.80ctw Green Prehnite, Fancy, Translucent

15.8 x 10.8 mm

$ 19.39

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20.09ct Brown Smoky Quartz, Fancy, Transparent

20.09ct Brown Smoky Quartz, Fancy, Transparent

35.1 x 19.1 mm

$ 33.02

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3.88ctw Multicolor Opal, Oval, Translucent

3.88ctw Multicolor Opal, Oval, Translucent

11 x 9 mm (calibrated)

$ 105.14

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0.81ct Green Tourmaline, Oval, Transparent

0.81ct Green Tourmaline, Oval, Transparent

5.6 x 4.8 mm

$ 16.14

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2.77ct Yellow Citrine, Cushion, VS

2.77ct Yellow Citrine, Cushion, VS

10.7 x 7.7 mm

$ 21.25

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12.31ct Brown Tiger'S Eye, Baguette, Opaque

12.31ct Brown Tiger'S Eye, Baguette, Opaque

18 x 13 mm (calibrated)

$ 12.26

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7.48ct Brown Smoky Quartz, Emerald Cut, VVS

7.48ct Brown Smoky Quartz, Emerald Cut, VVS

13 x 13 mm (calibrated)

$ 31.39

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0.94ct Orange Citrine, Heart, VVS

0.94ct Orange Citrine, Heart, VVS

7 x 7 mm (calibrated)

$ 7.80

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26.73ct Multicolor Tiger'S Eye Matrix, Pear Shape, Opaque

26.73ct Multicolor Tiger'S Eye Matrix, Pear Shape, Opaque

29.3 x 19.5 mm

$ 26.63

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6.99ctw Black Spinel, Round, Opaque
Spinel Product Video (553008)

6.99ctw Black Spinel, Round, Opaque

9 mm (calibrated)

$ 30.64

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2.03ct Yellow Citrine, Trillion, VVS

2.03ct Yellow Citrine, Trillion, VVS

9 x 9 mm (calibrated)

$ 13.35

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17.65ct Multicolor Jasper, Oval, Opaque

17.65ct Multicolor Jasper, Oval, Opaque

25 x 18 mm (calibrated)

$ 14.59

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11.97ct Multicolor Jasper, Fancy, Opaque

11.97ct Multicolor Jasper, Fancy, Opaque

22.3 x 12.9 mm

$ 19.68

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2.15ct Green Prehnite, Oval, Transparent

2.15ct Green Prehnite, Oval, Transparent

8.6 x 8 mm

$ 11.79

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1.31ct Yellow Citrine, Emerald Cut, VVS

1.31ct Yellow Citrine, Emerald Cut, VVS

8 x 6 mm (calibrated)

$ 9.13

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Why Buy Untreated Gemstones from GemSelect?

Natural Untreated Gemstones

Our untreated gemstones are completely natural and have not undergone any enhancement processes. These gems display their original color and clarity as formed in nature, making them highly valued by collectors, jewelers, and gemstone enthusiasts.

Buy Untreated Gemstones Online

At GemSelect you can easily shop untreated gemstones online with confidence. Our inventory includes carefully sourced loose gemstones from around the world, with full transparency regarding treatments and gem origins.

Natural Untreated Loose Gemstones

Why Choose Untreated Gems?

Untreated gems are prized because they remain exactly as nature created them. Without heat or chemical treatments, these stones offer rarity and authenticity that many collectors and jewelry designers prefer.

Unheated Sapphire and Ruby

Some of the most sought-after untreated gemstones include unheated sapphire and ruby. These rare stones retain their natural color and are highly valued due to the absence of heat treatment commonly used to enhance corundum.

Gemstone Authenticity and Transparency

Every gemstone at GemSelect comes with clear treatment disclosure. When purchasing untreated stones, buyers can be confident they are receiving authentic gems that have not been altered by heat or other enhancement methods.

Untreated Gems for Custom Jewelry

Natural untreated gemstones are perfect for custom jewelry pieces. Their unique appearance ensures every ring, pendant, or pair of earrings features a one-of-a-kind gemstone created by nature.

Rare and Collectible Gemstones

Because many gemstones are routinely treated, truly untreated examples can be relatively rare. Collectors often seek untreated stones because they represent the most natural state of a gemstone.

Learn more about gemstone treatments and natural gem formation on our Gemstone Treatment Guide.

FAQs

What are untreated gemstones?

Untreated gemstones are natural gems that have not been enhanced with heat, chemicals, irradiation, or other treatments. They retain their original appearance as formed in nature.

Are untreated gemstones more valuable?

In many cases untreated gemstones are more valuable because they are rarer than treated stones. Natural color without enhancement is highly prized by collectors and investors.

How can I tell if a gemstone is untreated?

Gemstone treatment is typically determined through gemological testing. Reputable sellers like GemSelect clearly disclose whether a stone is untreated or has received any enhancements.

Which gemstones are commonly untreated?

Some gemstones frequently found untreated include garnet, spinel, peridot, and certain sapphires. However, many gem types may be treated depending on their origin and quality.

Are untreated gemstones suitable for jewelry?

Yes, untreated gemstones can be excellent for jewelry depending on their hardness and durability. Popular choices include sapphire, ruby, spinel, and garnet.

GemSelect Certified Store Reviews

GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!

Overall Rating -> 10 star ratings

Love beauty, color, quality, and price of these gems. Personal projects and will come here soon and everytime.

Posted By Darkstar in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I was able to find what I've been looking for.

Posted By Tree Dog in April, 2026
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Overall Rating -> 7 star ratings

Easy, quick.

Posted By Mich in June, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I purchased from you before and I have never been disappointed. I always received what I expected and your products are very nice.

Posted By MVK in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

This is the first time I have used this site. I was dissatisfied with the quality of gems and supplies elsewhere and decided to try GemSelect. They are awesome! I was thrilled to see the variety and the great web performance. There was the ability to search for information as well as gems. Things like the clarity rating system and caret weight of the gems. I have always loved making things and I have just started to make jewelry as a business. However I have never made a ring before and have always wanted to. On GemSelect I was able to find good quality gems to use in my creations. I am so glad the website is so easy to use. Thank you GemSelect.

Posted By PickyShopper in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Enjoy viewing the selections. Excellent product

Posted By ToRa.62 in April, 2026
Source: Bizrate
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